modiloader | befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06-11-2024 05:14

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General

Target

befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe
Size

90KB
MD5

860328963ed2e2062e15efef77da5230
SHA1

ffff57582cef2b19b0509186bb8fc64e959e6cea
SHA256

befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696
SHA512

51fe9fcf3fbd214987439c74018aec1d2f868e5ab01725457e338882e863d89c6ef0485263c2c0e56577c5c475fd98fe1104ace963fdfbc440778789f567b33b
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDK:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3Y

Score

10^/10

modiloader discovery persistence trojan upx

Malware Config

Signatures

ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
trojan modiloader
Modiloader family
modiloader

ModiLoader Second Stage 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/392-55-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/392-56-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/392-58-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/392-64-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe

Executes dropped EXE 3 IoCs

Processes:

csrsll.execsrsll.execsrsll.exe

pid	Process
1548	csrsll.exe
2288	csrsll.exe
392	csrsll.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.execsrsll.exe

description	pid	Process	procid_target
PID 1968 set thread context of 440	1968	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	93
PID 1548 set thread context of 2288	1548	csrsll.exe	104
PID 1548 set thread context of 392	1548	csrsll.exe	105

UPX packed file 20 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/1968-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1968-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/440-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/440-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/440-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1968-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/files/0x000b000000023b91-29.dat	upx
behavioral2/memory/1548-37-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/440-40-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1548-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1548-42-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/392-50-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/392-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/392-55-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/392-56-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/392-58-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1548-59-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/440-62-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2288-63-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/392-64-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.execmd.exereg.execsrsll.execsrsll.execsrsll.exebefcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

csrsll.exe

description	pid	Process
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe
Token: SeDebugPrivilege	2288	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exebefcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.execsrsll.execsrsll.exe

pid	Process
1968	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe
440	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe
1548	csrsll.exe
2288	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exebefcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.execmd.execsrsll.exe

description	pid	Process	procid_target
PID 1968 wrote to memory of 440	1968	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	93
PID 1968 wrote to memory of 440	1968	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	93
PID 1968 wrote to memory of 440	1968	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	93
PID 1968 wrote to memory of 440	1968	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	93
PID 1968 wrote to memory of 440	1968	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	93
PID 1968 wrote to memory of 440	1968	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	93
PID 1968 wrote to memory of 440	1968	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	93
PID 1968 wrote to memory of 440	1968	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	93
PID 440 wrote to memory of 432	440	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	98
PID 440 wrote to memory of 432	440	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	98
PID 440 wrote to memory of 432	440	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	98
PID 432 wrote to memory of 4644	432	cmd.exe	102
PID 432 wrote to memory of 4644	432	cmd.exe	102
PID 432 wrote to memory of 4644	432	cmd.exe	102
PID 440 wrote to memory of 1548	440	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	103
PID 440 wrote to memory of 1548	440	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	103
PID 440 wrote to memory of 1548	440	befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe	103
PID 1548 wrote to memory of 2288	1548	csrsll.exe	104
PID 1548 wrote to memory of 2288	1548	csrsll.exe	104
PID 1548 wrote to memory of 2288	1548	csrsll.exe	104
PID 1548 wrote to memory of 2288	1548	csrsll.exe	104
PID 1548 wrote to memory of 2288	1548	csrsll.exe	104
PID 1548 wrote to memory of 2288	1548	csrsll.exe	104
PID 1548 wrote to memory of 2288	1548	csrsll.exe	104
PID 1548 wrote to memory of 2288	1548	csrsll.exe	104
PID 1548 wrote to memory of 392	1548	csrsll.exe	105
PID 1548 wrote to memory of 392	1548	csrsll.exe	105
PID 1548 wrote to memory of 392	1548	csrsll.exe	105
PID 1548 wrote to memory of 392	1548	csrsll.exe	105
PID 1548 wrote to memory of 392	1548	csrsll.exe	105
PID 1548 wrote to memory of 392	1548	csrsll.exe	105
PID 1548 wrote to memory of 392	1548	csrsll.exe	105
PID 1548 wrote to memory of 392	1548	csrsll.exe	105

C:\Users\Admin\AppData\Local\Temp\befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe
"C:\Users\Admin\AppData\Local\Temp\befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1968
- C:\Users\Admin\AppData\Local\Temp\befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe
  "C:\Users\Admin\AppData\Local\Temp\befcc91c6f3df62fbdc5a8ad308d4077e313608bb3342deb27b536dcb65e5696N.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:440
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DDSTQ.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:432
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Win Pdf" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe" /f
      4⤵
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:4644
- - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1548
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:2288
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\DDSTQ.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe

Filesize
90KB

MD5
1234b29407942ee29e49d5e364a8b18d

SHA1
404f890f3dfcbaf9a17d1d69a21ffe4d19b1c219

SHA256
099eb0d74fa82345e6e90871f5b58f506e15781dd82e0b23bee351ab478c1e00

SHA512
6731b0cd9f1d4c0c0dcf0c149b0d0203989d527eed1369c892c93b3069a342b00165e324e7217ad4368fc348b875aa8c8b330a90646ab35a7651e0385c3647db

Download Submit
memory/392-64-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/392-58-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/392-56-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/392-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/392-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/392-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/440-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/440-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/440-40-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/440-62-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/440-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1548-59-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1548-37-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1548-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1548-42-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1968-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1968-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1968-4-0x0000000002C70000-0x0000000002C72000-memory.dmp

Filesize
8KB

Download
memory/1968-6-0x0000000002C90000-0x0000000002C92000-memory.dmp

Filesize
8KB

Download
memory/1968-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1968-3-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download
memory/2288-63-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download